A preform tooling for a hard seal band

Abstract

The utility model relates to a kind of prefabrication tool of hard sealing band, comprising: base, for placing the shell to be prefabricated;Positioning ring, its inside is equipped with the shell to be prefabricated, for the positioning of shell to be prefabricated;Steel ball, it is set at the sealing surface position of shell to be prefabricated;Press bar, for the sealing surface of shell to be prefabricated is smooth surface;Guide seat, it is connected with base, press bar is inserted into guide seat, and guide seat is used for the guidance of press bar.The prefabrication tool of hard sealing band of the utility model, by press bar, guide seat, positioning ring, base, quenched steel ball and shell several parts are formed, positioning ring and base constitute the supporting component of shell, by press bar down press quenched steel ball can prefabricate the sealing surface of shell, pre-press into sealing band at orifice sharp edge sealing place, reach the requirement of smooth surface, the sealing band has good forming, depth can be accurately controlled, sealing effect is excellent, and the advantages such as high efficiency.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic precision component sealing technology, and in particular to a prefabricated tooling for a hard sealing strip. Background Technology

[0002] Valves can be classified into two types according to their sealing properties: soft seal and hard seal. Soft seals usually use F4 rubber material as the sealing surface (typically, F4 plastic is used as the sealing element). Although soft seals have good sealing performance, they are not wear-resistant, not heat-resistant, and not impact-resistant, making them unsuitable for high-temperature or high-pressure media applications. Hard seals, on the other hand, usually use metal materials as the sealing surface, especially by applying a powder metallurgy coating to the sealing area. This powder metallurgy coating serves as the sealing surface, thereby achieving the purpose of wear resistance, impact resistance, high pressure resistance, high temperature resistance, and corrosion resistance.

[0003] However, in products like hydraulic control valves, sealing is achieved using hard seals, such as the seal between a steel ball and a hole, or the seal between a cone and a hole. The condition of the orifice directly affects the sealing effect. For example, burrs, roundness, and roughness of the orifice edge often result in an uneven sealing surface, leading to poor sealing between the hard seal and the sealing surface and frequent leakage problems.

[0004] Therefore, it is urgent to solve the problem of the flatness of the sealing surface during the hard sealing process of the valve products. Utility Model Content

[0005] Therefore, the technical problem to be solved by this utility model is to overcome the problem that the sealing surface of the hydraulic control valve is uneven and leakage is easy to occur during the sealing process in the prior art.

[0006] To solve the above-mentioned technical problems, this utility model provides a prefabrication fixture for a hard sealing strip, comprising: a base for placing a shell to be prefabricated; a positioning ring disposed within the base, wherein the shell to be prefabricated is disposed within the positioning ring, and the positioning ring is used for positioning the shell to be prefabricated; a steel ball disposed at the sealing surface position of the shell to be prefabricated; a pressure rod, one end of which is inserted into the shell to be prefabricated, and the pressure rod presses against the steel ball to press the sealing surface of the shell to be prefabricated to a smooth surface; and a guide seat connected to the base, wherein the pressure rod is inserted into the guide seat, and the guide seat is used for guiding the pressure rod.

[0007] In one embodiment of this utility model, a height limiting block is provided on the base, and a moving gap is left between the height limiting block and the pressure rod, the moving gap being the moving stroke of the pressure rod.

[0008] In one embodiment of the present invention, the base is cylindrical, and a step is provided on the outer circumference of the lower end of the base. The guide seat is sleeved on the base, and the lower end of the guide seat is in contact with the step.

[0009] In one embodiment of the present invention, a positioning hole is provided at the center of the base. The positioning hole is a circular hole and is concentric with the base. The positioning ring is disposed in the positioning hole.

[0010] In one embodiment of this utility model, the positioning ring has a circular cross-section, and a positioning hole two is provided at the center of the positioning ring, and the shell to be prefabricated is disposed in the positioning hole two.

[0011] In one embodiment of this utility model, the lower end of the pressure rod is provided with a pressure head, the lower end of the pressure head is provided with a conical hole, and the upper end of the steel ball is placed in the conical hole.

[0012] In one embodiment of this utility model, the upper end of the pressure rod is provided with a limiting step, the pressure rod passes through the height limiting block, and the height limiting block contacts the limiting step for limiting the pressure rod.

[0013] In one embodiment of this utility model, the lower end of the guide seat is provided with a circular groove, the base is placed in the circular groove, the upper end of the guide seat is provided with a guide hole, the circular groove and the guide hole are connected, the circular groove, the guide hole and the positioning hole are coaxially arranged, and the pressure rod is arranged in the guide hole.

[0014] In one embodiment of this utility model, the height limiting block has a circular through hole at its center, the circular through hole and the pressure rod are coaxially arranged, and the pressure rod passes through the circular through hole.

[0015] In one embodiment of this utility model, the shell to be prefabricated is provided with a groove one and a through hole two, the groove one and the through hole two are connected, the transition position of the groove one and the through hole two is a sealing surface, the lower end of the pressure head is disposed in the groove one, the steel ball is placed in the groove one, and the steel ball is in contact with the transition position of the groove one and the through hole two.

[0016] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0017] The prefabrication fixture for the hard sealing strip described in this utility model consists of several parts, including a pressure rod, a guide seat, a positioning ring, a base, a hardened steel ball, and a shell. The positioning ring and the base constitute the supporting components of the shell. By pressing down the hardened steel ball with the pressure rod, the sealing surface of the shell can be prefabricated, and the sealing edge of the orifice is pre-pressed into a sealing strip to achieve the requirement of a smooth surface. This sealing strip has the advantages of good forming, precise depth control, excellent sealing effect, and high efficiency. Attached Figure Description

[0018] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0019] Figure 1 This is a cross-sectional view of the prefabricated tooling for the hard sealing strip of this utility model.

[0020] Explanation of the reference numerals in the accompanying drawings: Base 1, Step 11, Positioning Hole 12, Positioning Ring 2, Positioning Hole 21, Steel Ball 3, Pressure Rod 4, Pressure Head 41, Conical Hole 1 42, Limiting Step 43, Guide Seat 5, Circular Groove 1 51, Guide Hole 3 52, Height Limiting Block 6, Circular Through Hole 61, Movement Gap 7, Housing 100, Groove 101, Through Hole 2 102. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0022] Reference Figure 1 As shown, the prefabrication fixture for the hard sealing strip of this utility model includes: a base 1 for placing the shell to be prefabricated; a positioning ring 2 disposed inside the base 1, wherein the shell 100 to be prefabricated is disposed inside the positioning ring 2, and the positioning ring 2 is used for positioning the shell 100 to be prefabricated; a steel ball 3 disposed at the sealing surface of the shell 100 to be prefabricated; a pressure rod 4, one end of which is inserted into the shell 100 to be prefabricated, and the pressure rod 4 presses the steel ball 3 to press the sealing surface of the shell 100 to be prefabricated to be a smooth surface; and a guide seat 5 connected to the base 1, wherein the pressure rod 4 is inserted into the guide seat 5, and the guide seat 5 is used for guiding the pressure rod 4.

[0023] In the aforementioned structure, the base 1 is equipped with a height limiting block 6, and a moving gap 7 is provided between the height limiting block 6 and the pressure rod 4. The moving gap 7 is the travel distance of the pressure rod 4. The moving gap 7 between the height limiting block and the pressure rod is the pressing depth of the steel ball 3. By using height limiting blocks 6 of different heights, the pressing depth will also change accordingly to ensure precise depth control.

[0024] In the above structure, the base 1 is cylindrical, and a step 11 is provided on the outer circumference of the lower end of the base 1. The guide seat 5 is sleeved on the base 1, and the lower end of the guide seat 5 is in contact with the step 11. A positioning hole 12 is provided at the center of the base 1. The positioning hole 12 is a circular hole and is concentric with the base 1. The positioning ring 2 is disposed in the positioning hole 12.

[0025] In the above structure, the positioning ring 2 has a circular cross-section, and a positioning hole 21 is provided at the center of the positioning ring 2. The shell 100 to be prefabricated is placed in the positioning hole 21. The positioning ring 2 is cylindrical, which allows it to cooperate with the positioning hole 12 to form a concentric structure. At the same time, the positioning hole 21 at the center of the positioning ring 2 ensures that it is concentrically positioned with the shell 100 to be prefabricated, thereby ensuring that the shell 100 to be prefabricated is in the predetermined position.

[0026] In the above structure, the lower end of the pressure rod 4 is provided with a pressure head 41, and the lower end of the pressure head 41 is provided with a conical hole 42. The upper end of the steel ball 3 is placed in the conical hole 42. The conical hole 42 provided at the end of the pressure rod 4 ensures that the steel ball 3 falls exactly into the conical hole 42 during the pressing process, thus positioning the steel ball 3 and preventing it from shifting its position during the downward pressing of the pressure rod 4. The upper end of the pressure rod 4 is provided with a limiting step 43. The pressure rod 4 passes through the height limiting block 6, and the height limiting block 6 contacts the limiting step 43 to limit the pressure rod 4.

[0027] In the above structure, the lower end of the guide seat 5 is provided with a circular groove 51, and the base 1 is placed in the circular groove 51. The upper end of the guide seat 5 is provided with a guide hole 52. The circular groove 51 and the guide hole 52 are connected. The circular groove 51, the guide hole 52, and the positioning hole 12 are coaxially arranged. The pressure rod 4 is disposed in the guide hole 52. The pressure rod 4 cooperates with the inner hole of the guide seat 5, and the guide seat 5 provides guidance during the pressing of the pressure rod 4.

[0028] In the above structure, the height limiting block 6 has a circular through hole 61 at its center. The circular through hole 61 and the pressure rod 4 are coaxially arranged, and the pressure rod 4 passes through the circular through hole 61. When the pressure rod 4 is pressed down, the limiting step 43 contacts the height limiting block 6, and the pressure rod 4 reaches the pressing position. The height limiting block 6 can prevent the pressure rod 4 from pressing down beyond its stroke and causing damage to the shell 100 to be prefabricated.

[0029] In the above structure, the shell 100 to be prefabricated is provided with a groove 101 and a through hole 102. The groove 101 and the through hole 102 are connected. The transition position between the groove 101 and the through hole 102 is a sealing surface. The lower end of the pressure head 41 is set in the groove 101. The steel ball 3 is placed in the groove 101 and is in contact with the transition position between the groove 101 and the through hole 102.

[0030] The prefabricated housing 100 is positioned by a positioning ring 2, which mates with the inner hole of the base 1, and the guide seat 5 mates with the outer circle of the base 1. The concentricity requirement of the inner hole and outer circle of the base 1 ensures the overall positioning accuracy of the tooling.

[0031] The prefabrication fixture for the hard sealing strip of this utility model is not limited to using spherical steel balls 3. When the orifice of the shell 100 to be prefabricated is sealed with a steel ball, a hardened steel ball is pressed in to form a circular sealing strip; when the orifice of the shell 100 to be prefabricated is sealed with a cone, a hardened cone is pressed in to form a conical sealing strip. This hard sealing strip can fit well with either a steel ball or a cone, resulting in excellent sealing performance.

[0032] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A prefabricated tooling for a hard sealing strip, characterized in that, include: A base, which is used to hold the shell to be prefabricated; A positioning ring is disposed inside the base, and a housing to be prefabricated is disposed inside the positioning ring. The positioning ring is used for positioning the housing to be prefabricated. Steel balls are positioned at the sealing surface of the shell to be prefabricated. A pressure rod, one end of which is inserted into the housing to be prefabricated, and the pressure rod presses against the steel ball to press the sealing surface of the housing to be prefabricated to be a smooth surface; A guide seat is connected to the base, the pressure rod is inserted into the guide seat, and the guide seat is used to guide the pressure rod.

2. The prefabrication tooling for the hard sealing strip according to claim 1, characterized in that: The base is provided with a height limiting block, and there is a moving gap between the height limiting block and the pressure rod, which is the moving stroke of the pressure rod.

3. The prefabrication fixture for the hard sealing strip according to claim 1, characterized in that: The base is cylindrical, and a step is provided on the outer circumference of the lower end of the base. The guide seat is sleeved on the base, and the lower end of the guide seat is in contact with the step.

4. The prefabrication tooling for the hard sealing strip according to claim 3, characterized in that: The base has a positioning hole at its center. The positioning hole is circular and is concentric with the base. The positioning ring is located inside the positioning hole.

5. The prefabrication tooling for the hard sealing strip according to claim 1, characterized in that: The positioning ring has a circular cross-section, and a positioning hole 2 is provided at the center of the positioning ring. The shell to be prefabricated is placed in the positioning hole 2.

6. The prefabrication tooling for the hard sealing strip according to claim 2, characterized in that: The lower end of the pressure rod is provided with a pressure head, and the lower end of the pressure head is provided with a conical hole. The upper end of the steel ball is placed in the conical hole.

7. The prefabrication fixture for the hard sealing strip according to claim 6, characterized in that: The upper end of the pressure rod is provided with a limiting step, the pressure rod passes through the height limiting block, and the height limiting block contacts the limiting step for limiting the pressure rod.

8. The prefabrication tooling for the hard sealing strip according to claim 4, characterized in that: The lower end of the guide seat is provided with a circular groove, the base is placed in the circular groove, the upper end of the guide seat is provided with a guide hole, the circular groove and the guide hole are connected, the circular groove, the guide hole and the positioning hole are coaxially arranged, and the pressure rod is arranged in the guide hole.

9. The prefabrication fixture for the hard sealing strip according to claim 2, characterized in that: The height limiting block has a circular through hole at its center, and the circular through hole and the pressure rod are coaxially arranged, with the pressure rod passing through the circular through hole.

10. The prefabrication fixture for the hard sealing strip according to claim 6, characterized in that: The prefabricated shell is provided with a groove and a through hole, which are connected. The transition position between the groove and the through hole is a sealing surface. The lower end of the pressure head is set in the groove, and the steel ball is placed in the groove and in contact with the transition position between the groove and the through hole.

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